Cutter-head.



G. ROUSSELL. CUTTER m1). APPLICATION FILED NOV. 8, 1907.

909,025, v Pdtented Jan. 5,1909.

, GEORGE ROUSSELIEA, OF LUTOHER, LOUISIANA,

comma-man.

Specification of Letter: Patent.

Patented Ian. 6, 1900.

Application filed November 8, 1907. Serial No. 401,330.

To all whom it may concern:

Be it known that I, Gnome RoussnLL, a citizen of the United States, residing at Lutcher, in the parish of St. James and State of Louisiana, have invented certain new and useful Improvements in Cutter- Heads; and I do hereby declare the fo1lowing to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in cutter heads for dressing or planing lumber,

especially lumber of certain (grades in which the board must be dresse smooth finish.

It is well knownthat there is a great deal of loss in the manufacture of cypress boards, primarily on account of raised grains, whereby boards of certain grades cannot be dressed sufficiently smooth by the planer knives at present in operation, so that such imperfect boards are obliged to be segregated in a lower grade, and in consequence a considerable loss is suffered by the manuwith a very facturer which would not exist with the employment of a more perfected form of cutter head.

The object of the present invention, therefore, is to produce such a perfected form of cutter head as to improve the dressing of any sort of lumber, but primarily cypress.

In. carrying out this ob ect, the invention broadly consists in the provision of a stock, preferably of oval shape, and provided on each sidewith a plurality of spirally-disposed knives, the knives of each side being arranged parallel with respect to each other, but disposed in reverse directions of pitch with respect to the knives of the other side, and the knives of one side overlapping the knives of the opposite side, whereby in operation one set of knives operates over the entire face of the board with a spiral drawing out from right to left, while the other side similarly operates in the opposite direction as the first set of knives leaves the board, thus effectively and smoothly dressing the board, without leaving any raised or chipped grains.

While the invention is not restricted to the exact details of construction shown and described, still for the purpose of disclosure reference is had to theaccompanying drawings illustrating a practical embodiment of the same, in which like letters designate the 'same parts in the several views, and in F'gure 1 is a view of the cutter heads with the knives applied in side elevation. Fig. 2 is a central longitudinal section through the same. Fig. 3 is an end view looking to the left in Fig. 1, and with the bolts for securing the knives removed to show more clearly the slots for holding the knives adjusted in position, and Fig. 4 is a fragmentary view in perspective.

l designates the stock which is preferably oval and cast in one solid piece, with one or a plurality of spirally-disposed transversely extending raised abutments 2 located on opposite sides of the stock, which opposite abutments, as an entirety, are substantially disposed in the same spiral direction like the threads of a screw, but the abut-merits on one side of the oval stock being provided with a curved operating face 3, the spiral pitch of which is reversely disposed to the otherwise similar operating face 4 of the complemental abutment on the other side of the stock, the curvature of said faces 3 and 4 being such that said abutments overlap. These abutments, on the opposite sides of the operating faces 3 and 4, just referred to, may be provided with beveledoff portions and .6 adjacent the cutting edge of the knives which will now be referred to. These knives 7 are in the nature of suitably formed bits, provided with a suitable cutting edge 8, but the knives are curved to the form of the operating faces 3 and 4 of the abutments before referred to, so that by the contour of the knives the same will fit snugly against the operating face of the abutments with their cutting edge 8 adjustably held in proper position with relation to the beveled portions 5 and 6, with the cutting edge of opposite knives being consequently disposed in opposed spiral directions and overlapping each other, and the cross-section of said bits being inclined to a radius of the stock. These knives or bits are preferably adjustable on the operating faces of the abutments for obvious purposes, and for this reason the knives are provided with a plurality of slots 9 through which operate screws 10 threaded in the abutments.

From the foregoing it will thus be ob served that the spiral abutments, forming supports for the bits, extend transversely in a diagonal direction across the stock, with an abutment on one side lying longitudinally in substantially the same rotating plane as its complementary abutment on the other side, but curving in an opposite spiral direction.

It will also be seen that the knives of one set will operate on the board with a spiral drawing out, and as soon as that series of knives has left the board, the opposite overlapping series will operate on the face of the board with a spiral drawing out in the opposite direction, thus smoothly dressing the board as previously referred to, and besides dividing the strain on the bearings of the cutter head.

While the drawings simply show one cut ter head adapted to work above and dress the top faces of a board, it will be obvious, of course, that two cutter heads may be used, one above, and one below the board, so that both faces of the boards are dressed at the same time, the cutter heads rotating in opposite directions to draw the board therebetween.

Having thus described the invention, what is claimed is 1. The combination with a stock, of a pair of opposed bits thereon curved in opposite spiral directions and extending across said stock diagonally of its axis in substantially the same rotating plane, the crosssection of said bits being inclined to a radius of the stock, substantially as described.

2. The combination of a stock provided with a pair of transversely extending raised abutments, one each on opposite sides of said stock and lying longitudinally in substantially the same rotating plane but having bit faces curved in opposite spiral directions, and bits of the same contour as said curved faces with means for securing same thereon, substantially as described.

3. The combination ,of a stock provided with a pair of transversely extending raised abutments, one each on opposite sides of said stock and lying longitudinally in substantially the same rotating plane but having bit faces curved in opposite spiral direc tions, and bits of the same contour as said curved faces with means for adjustably securing the same thereon, substantially as described.

-'l. The combination of a stock provided with a pair of transversely extending raised abutments, one each on opposite sides of sand stock and lying longitudlnally in substantially the same rotating plane but hav- 4 directions, whereby the bits on one side GEORGE ROUSSELL. Vitnesses A. H. MEANS, Gno. H. JONES. 

